RCDD Chapter 1 Principles Of Transmission

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Letad1
L
Letad1
Community Contributor
Quizzes Created: 13 | Total Attempts: 6,764
| Attempts: 579
Quiz Flashcard
SettingsSettings
Please wait...
  • 1/175 Questions

    What does ECTFE stand for:

    • Ethylene Chlotifiberethain
    • Elastic Cloratyfluorethyne
    • Ethylene Chlorotrifluoroethylene
Please wait...
About This Quiz

This quiz, titled 'RCDD Chapter 1 Principles of Transmission', evaluates knowledge on optical communication principles such as WDM, attenuators, and light wavelengths. It tests understanding of technical specifics and environmental effects on transmission, crucial for professionals in telecommunications.

RCDD Chapter 1 Principles Of Transmission - Quiz

Quiz Preview

  • 2. 

    An analog signal is in the form of a wave that uses continuous variations in time (e.g. voltage amplitude or frequency variations) to transmit information.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    An analog signal is a form of transmission that utilizes continuous variations in time, such as voltage amplitude or frequency variations, to convey information. Unlike digital signals that use discrete values, analog signals provide a smooth and continuous representation of the data being transmitted. Therefore, the statement that an analog signal is in the form of a wave that uses continuous variations in time to transmit information is true.

    Rate this question:

  • 3. 

    Bandwidth is the information carrying capacity of a system.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Bandwidth refers to the maximum amount of data that can be transmitted over a network or communication channel in a given amount of time. It represents the information carrying capacity of a system, indicating how much data can be transferred at any given moment. Therefore, the statement "Bandwidth is the information carrying capacity of a system" is true.

    Rate this question:

  • 4. 

    The bit is the basic unit of digital data

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A bit is indeed the basic unit of digital data. It represents a binary value, either 0 or 1, and is used to store and transmit information in a digital format. All digital data, such as text, images, and videos, are ultimately represented and processed as a series of bits. Therefore, the statement "The bit is the basic unit of digital data" is correct.

    Rate this question:

  • 5. 

    What does AWG stand for:

    • American Wireless Gate

    • American Wire Gate

    • Available Wire Gauge

    • American Wire Gauge

    Correct Answer
    A. American Wire Gauge
    Explanation
    AWG stands for American Wire Gauge. This is a standardized system used to measure the diameter of electrically conducting wire. It is commonly used in North America to determine the size of wire for various electrical applications. The American Wire Gauge assigns a specific number to each wire size, with smaller numbers indicating larger wire diameters. This system helps ensure that wires are properly sized for their intended use, preventing issues such as overheating or electrical resistance.

    Rate this question:

  • 6. 

    Lasers have a high modulation frequency and can support data rates in excess of 10 Gb/s.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Lasers have a high modulation frequency and can support data rates in excess of 10 Gb/s. This statement is true because lasers are capable of emitting light at high frequencies, allowing for fast modulation of the signal. This high modulation frequency enables lasers to transmit data at speeds exceeding 10 gigabits per second (Gb/s).

    Rate this question:

  • 7. 

    Balance twisted-pair cables are commonly used for data telecommunications in buildings.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Balance twisted-pair cables are indeed commonly used for data telecommunications in buildings. These cables consist of pairs of wires twisted together, which helps to reduce electromagnetic interference and improve signal quality. They are widely used for Ethernet connections, telephone lines, and other data transmission applications within buildings.

    Rate this question:

  • 8. 

    When timing digital signals, what transmission type is performed by synchronizing the data bits in phase or in unison with equally spaced clock signals or pulses.

    • Synchronous

    • Asynchronous

    Correct Answer
    A. Synchronous
    Explanation
    Synchronous transmission is performed by synchronizing the data bits in phase or in unison with equally spaced clock signals or pulses. In this type of transmission, the sender and receiver are synchronized with each other using a common clock signal. The data is transmitted in fixed time intervals, ensuring that the receiver knows exactly when each bit of data is being sent. This allows for more efficient and reliable communication as errors can be easily detected and corrected. Asynchronous transmission, on the other hand, does not rely on a common clock signal and each data bit is sent individually with start and stop bits.

    Rate this question:

  • 9. 

    What term describes the transmission of a signal in only one direction.

    • Simplex

    • Half-duplex

    • Full-duplex

    Correct Answer
    A. Simplex
    Explanation
    Simplex is the correct answer because it refers to the transmission of a signal in only one direction. In simplex communication, data can only flow in one direction, either from the sender to the receiver or vice versa, but not both simultaneously. This type of communication is commonly used in situations where one device or party needs to continuously transmit data without any need for a response or feedback from the receiving end.

    Rate this question:

  • 10. 

    The maximum transmission of electrical power occurs when a transmitting device and a receiving device have the same load resistance or the same impedence.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    When a transmitting device and a receiving device have the same load resistance or impedance, it means that they are matched in terms of their electrical characteristics. This matching allows for maximum power transfer between the two devices, as there is no impedance mismatch that would cause power to be reflected back or lost in the transmission. Therefore, it is true that the maximum transmission of electrical power occurs when the load resistance or impedance is the same for both the transmitting and receiving devices.

    Rate this question:

  • 11. 

    Especially important in aerospace or computer applications, alloys such as cadmium-chromium copper and zirconium copper have important weight reduction or greater strength.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Alloys such as cadmium-chromium copper and zirconium copper are indeed especially important in aerospace or computer applications. These alloys offer weight reduction and greater strength, which are crucial factors in these industries. Therefore, the statement "Especially important in aerospace or computer applications, alloys such as cadmium-chromium copper and zirconium copper have important weight reduction or greater strength" is true.

    Rate this question:

  • 12. 

    WDM uses a series of lenses to refract and direct light pulses into a single optical fiber that carries the combined wavelengths

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Wavelength Division Multiplexing (WDM) is a technology that allows multiple wavelengths of light to be combined and transmitted over a single optical fiber. It achieves this by using a series of lenses to refract and direct light pulses into the fiber. This process enables multiple signals to be transmitted simultaneously, increasing the capacity and efficiency of the fiber. Therefore, the statement is true.

    Rate this question:

  • 13. 

    When selecting cable shields, the overall cable size limitations also may affect the decision.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement suggests that when choosing cable shields, the decision may be influenced by the size limitations of the overall cable. This implies that the size of the cable could impact the selection of suitable cable shields. Therefore, the statement is true.

    Rate this question:

  • 14. 

    What term describes the transmission of signals in either direction but only in one direction at a time.

    • Simplex

    • Half-duplex

    • Full-duplex

    Correct Answer
    A. Half-duplex
    Explanation
    Half-duplex is the correct answer because it refers to the transmission of signals in either direction, but only one direction at a time. In a half-duplex communication system, two devices can both send and receive signals, but not simultaneously. This means that when one device is transmitting, the other device can only receive, and vice versa. This mode of communication is commonly used in walkie-talkies and push-to-talk systems, where only one person can speak at a time while others listen.

    Rate this question:

  • 15. 

    EM waves are attenuated and reflected by a shield.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    EM waves are attenuated and reflected by a shield. This statement is true because a shield is designed to block or reduce the transmission of electromagnetic waves. When electromagnetic waves encounter a shield, they can be absorbed and dissipated as heat, which leads to attenuation. Additionally, the shield can reflect some of the waves, bouncing them off its surface. This property of shields makes them useful in various applications, such as protecting sensitive electronic devices from interference or blocking electromagnetic radiation in certain environments.

    Rate this question:

  • 16. 

    What are the two types of attenuators

    • Fixed

    • Random

    • Variable

    • Adjustable

    Correct Answer(s)
    A. Fixed
    A. Variable
    Explanation
    The question asks for the two types of attenuators. The correct answer is "Fixed" and "Variable". Fixed attenuators have a fixed level of attenuation and cannot be adjusted, while variable attenuators allow for adjustable levels of attenuation.

    Rate this question:

  • 17. 

    The series resistance R(line) is expressed in:

    • Watts

    • Ohms

    • Amps

    • Volts

    Correct Answer
    A. Ohms
    Explanation
    The series resistance R(line) is expressed in ohms. Ohms is the unit of measurement for resistance in an electrical circuit. It represents the opposition to the flow of electric current. In a series circuit, the total resistance is the sum of the individual resistances, and it is measured in ohms. Watts, amps, and volts are units used to measure power, current, and voltage respectively, but they are not applicable for expressing resistance.

    Rate this question:

  • 18. 

    A low dissipation factor is preferred

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A low dissipation factor is preferred because it indicates that the material or component being used has low energy losses and is more efficient. A high dissipation factor would mean that there are significant energy losses, leading to inefficiencies and potentially decreased performance. Therefore, it is desirable to have a low dissipation factor to ensure optimal efficiency and performance.

    Rate this question:

  • 19. 

    Attenuation of balance twisted pair cables increases at higher cable temperatures (above 20 degrees C {68 degrees F}

    • True

    • False

    Correct Answer
    A. True
    Explanation
    At higher cable temperatures, the attenuation of balanced twisted pair cables increases. This means that the signal strength or quality of the transmission decreases as the temperature of the cable rises. This can be attributed to factors such as increased resistance and impedance in the cable due to temperature effects. Therefore, it is true that attenuation of balance twisted pair cables increases at higher cable temperatures.

    Rate this question:

  • 20. 

    DS-1C systems are no longer being deployed.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement indicates that DS-1C systems are not being used anymore. Therefore, the correct answer is True.

    Rate this question:

  • 21. 

    A high dielectric strength is preferred

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A high dielectric strength is preferred because it indicates that the material can withstand high voltage without breaking down or experiencing electrical failure. This is important in various applications, such as insulation in electrical cables or components, where the material needs to be able to handle high electrical stress without compromising safety or performance. Therefore, a high dielectric strength is desirable as it ensures the reliability and durability of the material in electrical systems.

    Rate this question:

  • 22. 

    Light travels at what speed?

    • 100,000 km/s (62,000 mi/s)

    • 200,000 km/s (124,000 mi/s)

    • 300,000 km/s (186,000 mi/s)

    • 400,000 km/s (249,000 mi/s)

    Correct Answer
    A. 300,000 km/s (186,000 mi/s)
    Explanation
    Light travels at a speed of 300,000 km/s (186,000 mi/s). This is known as the speed of light and is a fundamental constant in physics. It is the maximum speed at which information or energy can travel in the universe according to the theory of relativity. This speed is incredibly fast, allowing light to travel around the Earth nearly 7.5 times in just one second.

    Rate this question:

  • 23. 

    A telecommunications transmission system consists of what three basic components?

    • Source of energy

    • Amplifier to strengthen the signal

    • Medium to carry the energy

    • Receiving device

    Correct Answer(s)
    A. Source of energy
    A. Medium to carry the energy
    A. Receiving device
    Explanation
    The correct answer for this question is that a telecommunications transmission system consists of a source of energy, a medium to carry the energy, and a receiving device. These three components are essential for the transmission of telecommunications signals. The source of energy provides the power needed to generate the signal, the medium carries the signal from one point to another, and the receiving device captures and decodes the signal at the destination. Without any of these components, the transmission system would not be able to function properly.

    Rate this question:

  • 24. 

    A shield is a metallic covering or envelope enclosing an (a):

    • Insulated conductor

    • Individual group of conductors within a core

    • Cable core

    • All of the Above

    Correct Answer
    A. All of the Above
    Explanation
    A shield is a metallic covering or envelope that can be used to enclose an insulated conductor, an individual group of conductors within a core, or a cable core. In other words, it can be used to protect and provide insulation to any of these components. Therefore, the correct answer is "All of the Above."

    Rate this question:

  • 25. 

    Insulation is also known as dielectric

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Insulation refers to the material or substance that is used to prevent the flow of electricity or heat. It is commonly used to protect wires and cables from damage or to control temperature in buildings. Dielectric, on the other hand, refers to a material that does not conduct electricity but can store electrical energy. Insulation and dielectric are often used interchangeably to describe materials that have similar properties of preventing the flow of electricity. Therefore, the statement "Insulation is also known as dielectric" is true.

    Rate this question:

  • 26. 

    The series inductance L(line) is expressed in:

    • Ohms

    • Henrys (H)

    • Farads (F)

    • Siemens (S)

    Correct Answer
    A. Henrys (H)
    Explanation
    The series inductance, denoted by L(line), is a measure of the ability of a circuit to store energy in the form of a magnetic field. It is expressed in Henrys (H), which is the SI unit for inductance. The unit is named after Joseph Henry, an American scientist who made significant contributions to the study of electromagnetism. Therefore, the correct answer is Henrys (H).

    Rate this question:

  • 27. 

    PVC-insulated conductors were commonly referred to as inside plant and PE-insulated conductors were commonly referred to as outside plant (OSP).

    • True

    • False

    Correct Answer
    A. True
    Explanation
    This statement is true because PVC-insulated conductors are typically used for wiring inside buildings or structures, making them suitable for inside plant applications. On the other hand, PE-insulated conductors are commonly used for outdoor installations, such as in underground or aerial applications, hence they are referred to as outside plant conductors.

    Rate this question:

  • 28. 

    Which of the following are not common electrical conductors?

    • Copper, and Copper alloys

    • Copper-covered steel

    • Aluminum

    • Silver and Gold

    Correct Answer
    A. Silver and Gold
    Explanation
    Silver and gold are not common electrical conductors because they have higher resistance compared to other materials like copper and aluminum. While silver and gold do conduct electricity, they are not commonly used in electrical wiring or other electrical applications due to their high cost and limited availability. Copper and copper alloys, copper-covered steel, and aluminum are widely used as electrical conductors due to their low resistance and good conductivity.

    Rate this question:

  • 29. 

    A higher attenuation number is better

    • True

    • False

    Correct Answer
    A. False
    Explanation
    A higher attenuation number indicates that more signal is being lost or weakened as it travels through a medium. Therefore, a lower attenuation number would be better as it means less signal loss and better transmission of the signal.

    Rate this question:

  • 30. 

    A simple model of a telecommunications system has what three parts?

    • Receiver

    • Amplifier

    • Transmitter

    • Medium

    • Impedence matching device

    Correct Answer(s)
    A. Receiver
    A. Transmitter
    A. Medium
    Explanation
    A simple model of a telecommunications system consists of three essential parts: a receiver, a transmitter, and a medium. The receiver is responsible for receiving the signals or information transmitted over the medium. The transmitter is responsible for encoding and transmitting the signals or information through the medium. The medium refers to the physical pathway or channel through which the signals or information travel. These three components work together to facilitate the communication process in a telecommunications system.

    Rate this question:

  • 31. 

    When a signal encounters a discontinuity in the medium carry the signal, some of the signal is reflected back to the transmitter. This is known as what?

    • Feedback

    • Distortion

    • Echo

    • Disipation

    Correct Answer
    A. Echo
    Explanation
    When a signal encounters a discontinuity in the medium carrying the signal, such as a change in impedance or a physical obstruction, a portion of the signal is reflected back towards the transmitter. This reflection causes a delayed and weaker version of the original signal to be received, which is known as an echo.

    Rate this question:

  • 32. 

    Delay skew is the difference in propogation delay between any pairs within the same cable sheath.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Delay skew refers to the difference in propagation delay between different pairs of wires within the same cable sheath. This delay can occur due to variations in the length or characteristics of the wires, which can result in different signal arrival times. Therefore, the statement that delay skew is the difference in propagation delay between any pairs within the same cable sheath is true.

    Rate this question:

  • 33. 

    What is the maximum source power output level for power over ethernet

    • 10.5 watts at nominal 24 volts

    • 11.4 watts at nominal 24 volts

    • 12.8 watts at nominal 48 volts

    • 15.4 watts at nominal 48 volts

    Correct Answer
    A. 15.4 watts at nominal 48 volts
    Explanation
    The maximum source power output level for power over ethernet is 15.4 watts at nominal 48 volts. This means that the power over ethernet system can provide a maximum of 15.4 watts of power when the voltage is at 48 volts.

    Rate this question:

  • 34. 

    What is the frequency range for VLF audio:

    • 30-300 kHz

    • 30-300 MHz

    • 3-30 kHz

    • 300-3000 MHz

    Correct Answer
    A. 3-30 kHz
    Explanation
    VLF stands for Very Low Frequency, and it refers to the range of electromagnetic waves with frequencies between 3 and 30 kHz. This frequency range is commonly used for communication with submarines and for various scientific research purposes. It is important to note that VLF audio refers specifically to the audio signals within this frequency range that can be heard by humans.

    Rate this question:

  • 35. 

    Which type of cabling insulation is used outside:

    • PVC

    • PE

    • FEP

    • ECTFE

    Correct Answer
    A. PE
    Explanation
    PE stands for Polyethylene, which is a type of plastic that is commonly used for cabling insulation in outdoor applications. PE insulation is preferred for outdoor use because it has excellent resistance to moisture, chemicals, and UV radiation. It is also durable and can withstand extreme temperatures, making it suitable for harsh outdoor environments. PE insulation provides reliable protection to the cables and helps ensure their longevity and performance.

    Rate this question:

  • 36. 

    A digital signal changes from one state to another in discrete steps?

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A digital signal changes from one state to another in discrete steps because it is represented by binary digits, which can only have two possible values (0 or 1). These values are used to represent different states or levels in the signal. The signal transitions from one state to another by changing the binary digit, which results in a discrete step change. This discrete nature of digital signals allows for accurate and reliable transmission and processing of information.

    Rate this question:

  • 37. 

    Which of the following are types of shields

    • Braided wire

    • Spiral-wrapped wire

    • Conductive nonmetallic materials

    • Hybrid, combining other types

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    The correct answer is "All of the above" because all the options listed (braided wire, spiral-wrapped wire, conductive nonmetallic materials, and hybrid) are types of shields. A shield is a protective covering or barrier that is used to protect something from external interference or damage. In the context of this question, shields are referring to types of shielding materials used in various applications such as electronics, cables, and wires to protect against electromagnetic interference (EMI) or radio frequency interference (RFI).

    Rate this question:

  • 38. 

    What describes the rate at which a signal can change state

    • Power

    • Baud

    • Bit

    • Bounce

    Correct Answer
    A. Baud
    Explanation
    The correct answer is Baud. Baud is a unit of measurement that describes the rate at which a signal can change state. It determines how many times a signal can change its state per second. It is commonly used in telecommunications to measure the data transmission rate, specifically in modems and serial communication. The higher the baud rate, the faster the data can be transmitted.

    Rate this question:

  • 39. 

    Transmitters have bandwidth limitations because they take time to change from a low power state to a high power state. This period is called what?

    • Signal time

    • Transmitter time

    • Power up time

    • Riser time

    Correct Answer
    A. Riser time
    Explanation
    Transmitters have bandwidth limitations because they take time to change from a low power state to a high power state. This period is called the riser time, which refers to the time it takes for the transmitter to transition from a low power level to a high power level. During this time, the transmitter's power output rises, causing a limitation in the bandwidth it can transmit.

    Rate this question:

  • 40. 

    Which digital timing method is less efficient because it requires the addition of some combination of start and stop bits to the data stream.

    • Asynchronous

    • Synchronous

    Correct Answer
    A. Asynchronous
    Explanation
    Asynchronous digital timing method is less efficient because it requires the addition of start and stop bits to the data stream. These bits are necessary to synchronize the sender and receiver, but they also introduce overhead and reduce the overall efficiency of the transmission. In contrast, synchronous timing methods do not require these additional bits and are therefore more efficient.

    Rate this question:

  • 41. 

    What causes a light pulse to broaden in duration as it travels through the optical fiber?

    • Attenuation

    • Dispersion

    • Resistance

    • SNR

    Correct Answer
    A. Dispersion
    Explanation
    As light pulses travel through an optical fiber, they can experience dispersion, which causes them to broaden in duration. Dispersion occurs due to the different wavelengths of light traveling at different speeds within the fiber. This leads to a spreading out of the pulse, resulting in a longer duration. Attenuation refers to the loss of signal strength, resistance refers to the opposition to the flow of electric current, and SNR (Signal-to-Noise Ratio) refers to the ratio of the signal power to the noise power, none of which directly cause the broadening of light pulses.

    Rate this question:

  • 42. 

    For power over ethernet, power may be delivered on the two unused pairs (4-5 and 7-8) or over the signaling pairs (1-2 and 3-6). The maximum source power output level is?

    • 15.4 watts at 44 to 57 V (nominally 48 V)

    • 15.4 watts at 20 to 20 V (nominally 24 V)

    • 10.4 watts at 8 to 17 V (nominally 12 V)

    • 10.4 watts at 2 to 11 V (nominally 6 V)

    Correct Answer
    A. 15.4 watts at 44 to 57 V (nominally 48 V)
    Explanation
    The correct answer is 15.4 watts at 44 to 57 V (nominally 48 V). This is because power over ethernet can be delivered on either the two unused pairs (4-5 and 7-8) or the signaling pairs (1-2 and 3-6). The maximum power output level is 15.4 watts, and the voltage range is 44 to 57 V, with a nominal voltage of 48 V. This means that the power over ethernet can deliver up to 15.4 watts of power within this voltage range.

    Rate this question:

  • 43. 

    If a shield is not properly grounded, its effectiveness will not be affected.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    If a shield is not properly grounded, its effectiveness will be affected. Grounding is essential for a shield to effectively divert unwanted electrical currents or electromagnetic interference away from the protected area. Without proper grounding, the shield may not be able to effectively dissipate or redirect these unwanted signals, leading to reduced effectiveness in protecting against electromagnetic interference. Therefore, the statement is false.

    Rate this question:

  • 44. 

    The ratio of the capacitance of an isulated conductor to the capacitance of the same conductor uninsulated in the air, describes which of the following?

    • Dielectric strenght

    • Dissipation factor

    • Dielectric constant

    Correct Answer
    A. Dielectric constant
    Explanation
    The ratio of the capacitance of an insulated conductor to the capacitance of the same conductor uninsulated in the air describes the dielectric constant. The dielectric constant is a measure of how well a material can store electrical energy in an electric field. It represents the relative permittivity of the material compared to that of a vacuum. A higher dielectric constant indicates that the material can store more electrical energy, while a lower dielectric constant indicates lower energy storage capacity.

    Rate this question:

  • 45. 

    The mutual capacitance C(line) is expresssed in

    • Henrys (H)

    • Farads (F)

    • Ohms

    • Siemans (S)

    Correct Answer
    A. Farads (F)
    Explanation
    The mutual capacitance C(line) is expressed in Farads (F) because capacitance is a measure of the ability of a capacitor to store electric charge. Farads is the unit of capacitance in the International System of Units (SI). It represents the amount of charge that can be stored per volt of potential difference across the capacitor. Therefore, expressing mutual capacitance in Farads is the appropriate unit for measuring the capacitance of a line.

    Rate this question:

  • 46. 

    Mutual inductance is a measure of:

    • Electric field coupling

    • Magnetic field coupling

    • Resistive field coupling

    • Harmonic field coupling

    Correct Answer
    A. Magnetic field coupling
    Explanation
    Mutual inductance is a measure of the magnetic field coupling between two coils or circuits. It quantifies the ability of one coil or circuit to induce a voltage in the other coil or circuit through the magnetic field they share. This phenomenon is the basis for the operation of transformers and other electromagnetic devices. Therefore, the correct answer is magnetic field coupling.

    Rate this question:

  • 47. 

    What is the rating for oxidation resistance for aluminum.

    • Poor

    • Fair

    • Good

    • Excellent

    Correct Answer
    A. Poor
    Explanation
    The rating for oxidation resistance for aluminum is poor. This means that aluminum is not very resistant to oxidation, which is the process of a material reacting with oxygen and forming an oxide layer. This poor rating suggests that aluminum is more likely to corrode or deteriorate when exposed to oxygen or other oxidizing agents.

    Rate this question:

  • 48. 

    Human beings can hear what frequency range?

    • 300 Hz. - 3400 Hz.

    • 200 Hz. - 1000 Hz.

    • 20 Hz. - 20,000 Hz.

    • 30 Hz. - 30,000 Hz.

    Correct Answer
    A. 20 Hz. - 20,000 Hz.
    Explanation
    Human beings can hear sounds within the frequency range of 20 Hz to 20,000 Hz. This range is known as the audible range of frequencies for humans. Frequencies below 20 Hz are known as infrasound, which is below the threshold of human hearing, while frequencies above 20,000 Hz are known as ultrasound, which is also beyond the range of human hearing. Therefore, the correct answer is 20 Hz to 20,000 Hz.

    Rate this question:

  • 49. 

    What is the smallest size conductor:

    • 34 Gauge

    • 28 Gauge

    • 36 Gauge

    • 32 Gauge

    Correct Answer
    A. 36 Gauge
    Explanation
    The gauge of a conductor refers to its diameter, with a higher gauge number indicating a smaller diameter. Therefore, the smallest size conductor among the given options is 36 Gauge, as it has a smaller diameter compared to 34 Gauge, 28 Gauge, and 32 Gauge.

    Rate this question:

Quiz Review Timeline (Updated): Mar 11, 2024 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 11, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 28, 2012
    Quiz Created by
    Letad1
Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.